Bending machine roll



Sept. 12, 1933. A. T. YATES BENDING MACHINE ROLL Filed March 25, 1932 ,Patented Sept. 12, 1933 I 1;926,830 BENDING MACHINE ROLL ArthurT. Yates, West Seneca, N. Y., assig'norto LBuffalo Forge Company, Buffalo,

1 Application March1932. Serial No. 601,200 I 12 1 Claims. (01.153-1-57) invention relates to machines for bending metal bars and the; like, and particularly to improvements in the construction of bendinglrolls used on machines of this kind. 1

, 5 The objects of this Invention are to provide a bending machine in which means are provided for adjusting the g ro'ovesiin the bending rolls so that the groove on the inside roll will be'of greater width than the grooves on the outside rolls;

also to provide bending machine rolls with adjusting means, whereby both'side walls of f the groove in a roll may be adjusted toward andfrom the center of the groove; alsoto provide a bend ing roll having'meansf adjacent to the outer end of thegroove in the roll; also to improve theconstruction of bending rolls of this kind in other respects hereinafter specified. r

In the accompanying drawing:

Fig. 2 is a sectional view thereof, on line 22, Fig.1J f 4 My improvement may be. applied to a bending .machine of any'suitable or desired construction,

with rolls used for bending lflat bars on edge. When this is done the "cross section of the bar becomeschanged by the bending operation, the,

innerportion or edge of the bar, i..e., the portion nearest to the radius of curvature, becoming enlarged or upset as indicated by the cross section of the barX shovv'ri in Fig. 2., In order to accommodate thefgroove's inthe bending' rolls ,to receivesuch enlarged edge of thebar, I provide narrower grooves onthe outer bending'rolls than on the inner roll, and I also provide means'for spacing the side walls of eachof these grooves at equal distances from the centralplane of the bar. In bending rolls heretofore made, each roll consisted of two parts, one of'which was fixed to its 'roll shaft and the other oflwhich was adjustable toward and from the fixed partfto change the width of the groove. 7 Rolls of this kind,'however, cannot be adjusted to accommodate bars which. are wider at one edge than at the other edge. In accordance 'with my, invention, rolls having only one of their roll partsadjustable may ."be used on one edge of the bar, but'the rolls'cooperating with the other edge have both parts have their side wallsspaced at equal distances from a plane'midway of the groovewallsfoi the other rollss In the accompanyingjdrawing; the inner roll is shownas having bothroll parts adjustable, since only one inner iollisv used, but it and C the inside roll which issuit'ably mounted thereof for conveniently'adjusting both side walls ing machine shown, the outside rolls B are driven 7 Fig. 1 is a plan'view of a set of bendingrolls; i I p I 'tion shown, includes a sleeve 5 suitably held and isparticularly desirable for use in connection 7 5'm'ay'be made of a softer andmore easily mattheinner'face or which forms one 'of the side suitably hardened metal and which is secured to 12. This'collar is secured to the shaft E by part ll may be securedtothe collar 12-:in-a'ny suitable manner, for example, by means of a welded connection indicated by 13. Each roll B,

therefore, includes an inner part fixed to the nular flange 11, and an outer part, including the adjustable so that the grooves in such rolls may will be understood that the outer rolls maybe adjusted in this manner; if desired.

In the embodiment of the invention shown in the drawing, A, Fig. 1,-may represent either a top plate or frame member of a bending machine .60 having, the roll shaftsarranged vertically, 'or the end'plate of a bending machine with horizontal roll shafts. 13 represents the outside rolls of the bending machine, which may be mounted on shafts journalled in fixed relation to this plate, 65

for adjustment toward and from the outside rolls in any usual or suitable manner, such adjusting n eansnot being shown. In the particular bendand each roll B is secured on a shaft E, and the roll'C is an idler roll, being: mounted" to rotate abouta fixedshaft or axle F. The roll C may, howevenbe driven ifdesired.

I Each outside roll B, inthe particular construC- 7 against turning on the shaft E, for example, by means of a'key '6, The sleeve"5"preferably has an outer sleeve 'Tse'curedthereto in any suitable manner, not shown. The outersleeve' may be made of a hardened ortool steel and the sleeve,

chined metal. The oute'rsleev'e Tl preferahly has an outwardly extending annular ridge or part "8,

walls or" the groove which receivedthe bars to be bent the annular face of the sleeve "7 forming the ba'se'of the groove. V

The opposite sidewall of* the groove is formed by a face 10 of anannular'or cylindrical part'll whichmay also be made of tool steelor other the outer portion of a radially extending collar means of the key 6 and is also held against endwise movement on the shaft-EL' The sleeve or shaft E and consisting of the collar 12 and its ansleeves 5"and8, which is adjustable lengthwise of the shaft E and which may telescopically' enter into the cylindrical flange 11. h V

In order to render the outer part of theroll adjustable relatively to the inner fixed part, to varythe width of the groove formed between these two parts, the sleeve 5 is provided on its outerend with "acap 15 which may be integrally formed therewith and which has a centralaperture 16 through which an adjusting screw or stud 17 extends. The inner end of this screw or stud engages in a threaded hole in the end of the shaft E. The screw or stud 17 is also provided with an outwardly extending flange 13 which is adapted to bear against the innerface of the cap portion of the sleeve 5, and if desired, a bearing plate or washer 19may be inserted between this flange and the cap portion 15; The portion of the screw or stud 1'7 beyond the flange 18 is preferably also threaded, as indicated at 20, to receive a nut 21 engaging the outer face of the cap portion 15. The outer end of the screw or stud may also be provided with a head 22 by means of which the same can be turned. By means of this arrangement, the width of the groove between the walls 9 and 10 can be readily adjusted by first sli htly releasing thenut 21 and then turningthe screw 17 by means of the head 22 thereof. This causes the screw to enter into,

or move out of, the threaded hole in the end of. the shaft E and this movement of the screw causes a corresponding movement of the sleeve 5. When the desired adjustment is reached, the nut 21 is tightened so that the parts will be securely locked in place. It will be noted that in this roll only one of the side walls of the groove, namely, the side wall 9, is adjusted, the other side wall 10 remaining in fixed relation to the shaft E.

Referring now to the roll (3, this roll also includes an inner sleeve 25 which, in the construction shown,is journalled to rotate freely about the stud or fixed shaftF, a bearing sleeve 26 being for this'purpose inserted between the sleeve 25 and the stud The sleeve 25 near the inner end of the roll has a radially extending flange 27 to which a cylindrical part or sleeve28 may be rigidly secured, for example, by means of welding as indicated at 29. Theouter edgeof the band or sleeve 28 forms a wall- 30 of the groove in this roll and in order to adjust this wall 30 toward and from the center of the groove in this roll,-any suitable adjusting means cooperating with the shaft or axle Fniay be employed. in the particular construction shown for this purpose, the outer end of the sleeve 25 may be provided with a transversely extending web 31 havinga central aperture32, and ascrew-lthreaded bolt or adjusting screw 35 is provided, theinner threaded end of which is adapted to e'ngagewith a correspondingly threaded aperture in the end of the stud shaft F. This adjustingscrew 35. is preferably also provided with an annular, outwardly extending flange 36 adapted to bear against the inner face of the web 31, a bearing disk or washer 37 beingprovided for this purpose in the construction shown. The portion of this screw 35 which extends beyond the transverse web 31 of the sleeve 25 is preferably also threaded and adapted to receive a nut 38, which may be suitably locked in place on this end of the adjusting screw 35 in any suitable manner. 'Fcrexample, this nut may be split, as indicated at 39, anda clamping screw 40, having a threaded engagement with a part of the nut 39 at one side of the split and pressing against the other side, may be employed to lock the nut 38 securely on the threads of the bolt 35. Any other means for this purpose may be employed.-

Any suitable means may also be provided; for locking the adjusting screw .35 in .the threaded hole in the fixed shaft or axle F and, in the construction shown for this purpose, the screw 35 may be split, as indicated by the slot 42 therein,

and the split end may be expanded to grip the wall of the threaded aperture in the axle or shaft F. The gripping means may include a bolt 43 which extends lengthwise through a bore or central aperture in the adjusting screw 35, and the inner end of this locking bolt is provided with a tapered head 44 which preferably engages with a correspondingly tapered end of the bore in-the adjusting screw 35. Consequently, it will be obvious that if the locking bolt 43 is drawn outward- 1y with reference to the adjusting screw 35, as by tightening a nut 45 engaging the threaded end of the bolt 43 and bearing against the end of the screw 35, the tapered sides of the head 44 will engage with the correspondingly tapered inner face of the bore in the adjusting screw and will thus spread ,or'separate the lower split ends of this screw, and thus press the same into engagement withthe threaded hole in the fixed shaft F.

I Consequently, the adjusting screw 35 can be easily adjusted lengthwise of the shaft or axle F and such adjustment results in a corresponding adjustment of the part of the bending roll 0 which includes the sleeve'25 and annular member 23.

To facilitate such adjustment the outer end of the screw 35 is preferably formed to enable it to be gripped by a wrench, for example, by providing a hexagonal end 46 on the screw 35. Consequently, when it is desired to change the adjustment'ofthe sleeve 25 and ofthe wall 30 of the groove, the nut 45 is first loosened and the outer end of the bolt 43 may be tapped slightly to release'the wedge end 44 thereof from the bore in the adjusting screw 35. The screw 35 is then released from its clamping action and is free to be turned by means'of a. wrench engaging the head 46 of the screw. The flange 36 and the nut 38 will transmit to the sleeve25 any longitudinal adjustment of the screw 35,'and when the desired adjustment has been made, the nut 45 is tightened to again clamp the screw 35 in its adjusted position.

The inner roll 0 also includes another adjustable part forming the opposite side wall of the roove and also the base of the groove in this roll. This part of the roll in the construction its shown includes a sleeve'48 having an outwardly 48 has an extension 50 suitably secured thereto,

for example, by means of bolts 51 and the outer end of this extension is threaded to engage with 4 a threaded portion 52 at the outer end of the sleeve 25. The threaded part of the extension 50 may be split and provided at opposite sides of the split with lugs or projections 53 through which a clamping bolt 54 extends for clamping the threaded part of the extension 50 against the threaded portion 52 to hold the collar 48 in fixed relation to the sleeve 25. 'When it is desired to change the adjustment of the sleeve 48, the bolt 54 is released so that the extension 50 with the sleeve '48 secured thereto can be freely rotated lengthwise of the threadedportion 52. The rotation of the sleeve 48and extension 50 provides for the adjustment of these parts lengthwise of the axis of this roll, and when the desired adjustment has been made, the bolt 54 is again tight-- lie if desired. W 1 H In the use of the bending r'olls illustrated; if a bar is to be bent' o'n edgea's indicated in" the drawings; the groove in thefouter bending *rolls 'is'adjusted to receive the outerend of 'the bar. The groove in theinner bending roll is theniad- "justed in such a way-that the opposite sides of this groove will be -spaced at substantially edual distances from'thecentral plane of the work,

which central plane will also coincide with the centersj of the grooves in the outer-bending rolls.

BecauseI0f-the upsetting of theinne'r edge-porflpto said first side wall'part. 1 a A bending machine rollhaving parts adjustable relatively to each otherto form the side tion or-the bar or -work X," each of the'walls" of the groove in the inner bending roll will have to be lo'catedat-aslightly greater distancefrom this plane than the corresponding walls-"of the grooves inthe outer rolls. Consequently, in adjusting-a machine'to operate ona -bar of a -ce'r- 3 tainsi'ze, the outer rolls are adjusted so that Tthe walls-9 'and 10 of the grooves in thes'rolls are spaced apart as may-be necessary accordingto the widthof the bar 'X. The side wall 30 of the groove of the inner roll is then set in a plane slightly below the plane of the sidewalls 10 of the outer rolls as indicated in Fig. 2. The upperside wall of the'groove formed by the flange 49 is then set slightly above .the plane of the side' walls 9 of the groovesin the outer rolls. Both.

of the side walls of the. groove ofthe inner roll will, therefore, be. spaced approximately equidistant from a plane extending midway between the side walls of all of the grooves of the rolls and midway of the work.-

By means of this "arrangement, the-1 machine can be readily adjusted to operate on bars of different shapes or sizes without removing the rolls,

from their shafts or bearings. While the inner roll has been described as having both of the side walls of the groove adjustable, it will be obvious that this arrangement can be reversed byproviding an adjustment on the two outer rolls similar to that shown on the inner roll in the construction illustrated, and by making the inner roll of a constructionsimilar to that illustrated in connection with the outer rolls. In, such a case,

the inner roll would be adjusted with a groove of sufficient width to receivethe enlarged or upset edge of the bar and the side walls of the grooves of the outer rolls would be set to form narrower grooves, but equi-distant from the central plane of the bar. Since, however, ityis only necessary to provide an adjustment of. both side walls of the groove or grooves at either one or the other edge of the work, it is,, of course, more expedient to provide such adjustment only on the inner roll and employing adjustment for, only one groove wall for the outside rolls.

I claim as. my invention:

1. A bending machine roll forbending flat bars on edge, including partsforming opposite sides of a groove, a cylindrical part forming the bottom of the groove and against which the edges of the bars bear, said side parts having portions connecting therewith extending to one end of. said roll, and means on saidend of said roll and cooperating with saidportions for adjusting each of said side parts relatively to the other.

2. A bendingmachine forbendingflat bars on' edge and having rolls arranged inside andoutside with reference to the curvature of the work, said outside rolls having adjustable parts ar ranged to form grooves of different widths to re-. ceive the work, said inside roll having parts forming-the side wallsof agro'ove, and means'for'ad- "justing both of-said 'parts toward" and from a "plane passing through the 'centers of the grooves of said outside rolls; allfof said rolls having *cylindrical portions forming-the bottoms of-said groove and against which the work bears:

3L-A bending machine'roll having i-pa'rts adjustable relatively to each other to formthe side walls 'of an annular groove to! the work, a cylin- -dri'cal part forming the bottom of the groove and on which the work bears,-a'shaft on which said 3 parts are *mounted, one of said side wall parts being adjustable lengthwise of said shaft and the other side wall part being adjustable relatively walls of anannular groove for the work, a cylindrical' part forming-the bottom of the groove and on which the work bears,'a shaft on which said -part's:-'are'mounted, one of said parts having a sleeve-arranged about said "shaft, means at one end of said sleeve and cooperating with said them an annular groove for thework, a shaft on which said parts are: mounted, one or" said parts having a sleeve arranged about said shaft, means at one end of said sleeve. and cooperating with said shaft for adjusting said part lengthwise of said shaft, and means cooperating withsaid sleeve and said other part for adjusting said other part lengthwise of saidshaft relatively to said first part.

6. A'bending machine roll having parts adapted to cooperate to form between" them an annular groove, one of said parts including a radial- 7 1y extending "part having acylindrical member 1 secured thereto, one end of said cylindrical member forming a-side'wall of said groove, the other 120 part of said roll including a sleeve adapted to telescope into said cylindrical member and forming the base of said groove, and having a flange forming. the other sidewall of said groove, and means for adjusting one of said parts relatively to the other to vary the width of said groove.

adjusting screw-engaging in a threaded hole in said shaft and having a connection with said annular parts adjustable toward and from each other to form between them an annular groove to receive the work, one of said parts including a sleeve, a shaft extendinginto said sleeve, an adjusting screw engaging in a threaded hole in said shaft and having a connection with said sleeve for adjusting said sleeve lengthwise of said shaft, and a screw threaded connection be j tween said sleeve and said other part of said roll for adjusting said other part lengthwise.

of said sleeve'to vary the'width of said groove.

9. A bending machine having rolls arranged inside and outside with reference to the curvature c of the work, said insideroll including two an} '7. A bending machine roll having a pair of an- 7 nular parts adjustable toward and fromeach other to form between them an annular groove 1 to receive thework, one of said parts including a sleeve, a shaft extending into said sleeve, an

nular 'parts forming between them a; groove to receive the, work, one of said annular parts having a sleeve of smaller diameter than said other annular part against which the work may bear and which telescopes within the other annular part, and means for adjusting said annular parts in opposite directions from the center 01' 'the groove. c

10. A bending machine roll for bending fiat bars on edge, including a pair of annular parts forming between them an annular groove to receive the work, one of said parts having 9. cy-,

slindricalportion of less diameter than said other part and movable into and out of a corresponding recess in the other part during adjustment of said parts relatively to each other, said cylindrical portion bearing against the edges of the bars, and means for adjusting said annular parts in opposite directions from the center of said groove. l

11'. A bending machine for bending flat bars on edge and having rolls arranged inside and outside with reference to the curvatureof the.

work, each of said rolls having a work receiving groove therein provided withside wallsand a bottomrwallby means'of which'bendingpressure is transmitted to the work, the outside rolls each having at --least one side wall adjustable to vary the width of the groove to'receive work of different sizes, and the inside roll having both of its side walls adjustabletoward and from each other 12. A bending machine for bending flat bars on edge and having rolls arranged inside and.

outside with reference. to the curvature of the work, each of said rolls having a work receiving groove therein provided with a bottom wall adapted to engage an edge of the work to-exert bending pressure thereon, said grooves also having side walls which are adapted to engage portions of the sides of the work, and means for adjusting the side walls of the groove of the inside roll to form on said inside roll a groove of greater width than the grooves of said outside rolls andwith the .side walls of the groove .of said inside roll spaced substantially equidistant from the central plane of the work.

' ARTHUR T. YATES.

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